Fixed link error on GCC and clang. They complain about missing symbols even when…

src/common/version.h

 #define MAJOR_VERSION 1
 #define MINOR_VERSION 0
 #define BUILD_VERSION 0
-#define BUILD_REVISION 1195
+#define BUILD_REVISION 1196
 
 #define STRINGIFY(x) #x
 #define MACRO_STRINGIFY(x) STRINGIFY(x)

src/compiler/glslang.l

@@ -272,9 +272,8 @@ O           [0-7]
 
 %%
 
-#if !ANGLE_USE_NEW_PREPROCESSOR
+// Old preprocessor interface.
 extern "C" {
-// Preprocessor interface.
 #include "compiler/preprocessor/preprocess.h"
 
 extern int InitPreprocessor();
@@ -399,7 +398,6 @@ void updateExtensionBehavior(const char* extName, const char* behavior)
     context->handleExtensionDirective(yylineno, extName, behavior);
 }
 }  // extern "C"
-#endif  // !ANGLE_USE_NEW_PREPROCESSOR
 
 int string_input(char* buf, int max_size, yyscan_t yyscanner) {
     int len = 0;

src/compiler/glslang_lex.cpp

@@ -2948,9 +2948,8 @@ void yyfree (void * ptr , yyscan_t yyscanner)
 
 #define YYTABLES_NAME "yytables"
 
-#if !ANGLE_USE_NEW_PREPROCESSOR
+// Old preprocessor interface.
 extern "C" {
-// Preprocessor interface.
 #include "compiler/preprocessor/preprocess.h"
 
 extern int InitPreprocessor();
@@ -3075,7 +3074,6 @@ void updateExtensionBehavior(const char* extName, const char* behavior)
     context->handleExtensionDirective(yylineno, extName, behavior);
 }
 }  // extern "C"
-#endif  // !ANGLE_USE_NEW_PREPROCESSOR
 
 int string_input(char* buf, int max_size, yyscan_t yyscanner) {
     int len = 0;